import pygame.font

class Button():
	def __init__(self, screen, msg, x, y):
		"""初始化按钮的属性"""
		self.screen = screen
		self.screen_rect = screen.get_rect()
		# 设置按钮的尺寸和其他属性
		self.width, self.height = 100, 50
		self.button_color = (0, 120, 215)
		self.text_color = (255, 255, 255)
		self.font = pygame.font.SysFont('SimHei', 25)
		# 创建按钮的rect对象，并使其居中
		self.rect = pygame.Rect(0, 0, self.width, self.height)
		# 创建按钮的rect对象，并设置按钮中心位置
		self.rect.centerx = x - self.width / 2 + 2
		self.rect.centery = y - self.height / 2 + 2
		# 按钮的标签只需创建一次
		self.prep_msg(msg)
	def prep_msg(self, msg):
		"""将msg渲染为图像，并使其在按钮上居中"""
		self.msg_image = self.font.render(msg, True, self.text_color, self.button_color)
		self.msg_image_rect = self.msg_image.get_rect()
		self.msg_image_rect.center = self.rect.center
	def draw_button(self):
		# 绘制一个用颜色填充的按钮，再绘制文本
		self.screen.fill(self.button_color, self.rect)
		self.screen.blit(self.msg_image, self.msg_image_rect)